Stock futures trimmed gains on Thursday after data showed the U.S. economy grew at a slower pace than previously estimated in the first quarter.

S&P 500 futures were up 21.1 points, above fair value, a formula that evaluates pricing by taking into account interest rates, dividends and time to expiration on the contract. Dow Jones industrial average futures rose 169 points, and Nasdaq 100 futures added 33.75 points.

Another report showed unemployment claims fell last week.

(Reporting by Caroline Valetkevitch; editing by Jeffrey Benkoe)